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Finding the Fourth Proportional to 21,731.20, 32,567.04 and 15,860.32

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Solution

The fourth proportional to 21,731.20, 32,567.04 and 15,860.32 is: 23,768.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,731.20 : 32,567.04 = 15,860.32 : x
  2. Step 2: Convert to fraction form
    21,731.20/32,567.04 = 15,860.32/x
  3. Step 3: Cross multiply
    21,731.20x = 32,567.04 × 15,860.32
  4. Step 4: Simplify right side
    21,731.20x = 516,523,675.85
  5. Step 5: Solve for x
    x = 516,523,675.85/21,731.20
  6. Step 6: Final answer
    x = 23,768.76

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.